From 0cdc4bd8baf4d29e594af849ac1a96ab3cbc4a15 Mon Sep 17 00:00:00 2001
From: Manuel de Brito Fontes <aledbf@gmail.com>
Date: Tue, 14 Feb 2017 14:24:25 -0300
Subject: [PATCH] Pass headers to custom error backend

---
 .../nginx/rootfs/etc/nginx/lua/error_page.lua      | 14 +++++++-------
 .../nginx/rootfs/etc/nginx/template/nginx.tmpl     |  4 ++--
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/controllers/nginx/rootfs/etc/nginx/lua/error_page.lua b/controllers/nginx/rootfs/etc/nginx/lua/error_page.lua
index e8a26ee9e..2b9178a56 100644
--- a/controllers/nginx/rootfs/etc/nginx/lua/error_page.lua
+++ b/controllers/nginx/rootfs/etc/nginx/lua/error_page.lua
@@ -8,17 +8,17 @@ local get_upstreams = upstream.get_upstreams
 local random = math.random
 local us = get_upstreams()
 
-function openURL(status)
+function openURL(original_headers, status)
     local httpc = http.new()
 
+    original_headers["X-Code"] = status or "404"
+    original_headers["X-Format"] = original_headers["Accept"] or "text/html"
+
     local random_backend = get_destination()
     local res, err = httpc:request_uri(random_backend, {
         path = "/",
         method = "GET",
-        headers = {
-            ["X-Code"] = status or "404",
-            ["X-Format"] = ngx.var.httpAccept or "html",
-        }
+        headers = original_headers,
     })
 
     if not res then
@@ -26,8 +26,8 @@ function openURL(status)
         ngx.exit(500)
     end
 
-    if ngx.var.http_cookie then
-        ngx.header["Cookie"] = ngx.var.http_cookie
+    for k,v in pairs(res.headers) do
+        ngx.header[k] = v
     end
 
     ngx.status = tonumber(status)
diff --git a/controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl b/controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl
index d018d4ebb..c3da80de8 100644
--- a/controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl
+++ b/controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl
@@ -407,7 +407,7 @@ http {
         location / {
             {{ if .CustomErrors }}
             content_by_lua_block {
-                openURL(503)
+                openURL(ngx.req.get_headers(0), 503)
             }
             {{ else }}
             return 503;
@@ -477,7 +477,7 @@ stream {
         location @custom_{{ $errCode }} {
             internal;
             content_by_lua_block {
-                openURL({{ $errCode }})
+                openURL(ngx.req.get_headers(0), {{ $errCode }})
             }
         }    
         {{ end }}